Lubricant pump



P 1950 F. c. WOELFER 2,521,671

LUBRICANT PUMP Filed May 2, 1947 IIIIIIIIYIIIA V II/IA INVENTOR. W MW m amq Patented Sept. 5, 1950 LUBRICANT PUMP Frank C. Woelfer, Cincinnati, Ohio, assignorto Balcrank, Inc.,. of Ohio Application May This invention relates to pumping apparatus of the type known as bucket pumps. It is particularly directed to improvements in this type of apparatus for pumping oil or the like from the pump to points of use. been specifically designed to deliver oil under low pres-sure from the pump container-to the differential or transmission of an automobile.

The present pump is portable, the operator carrying the pump to the approximate location of the automobile to be oiled. The pump rests at some point adjacent the car and by the use of a piston type hand operated pump mechanism the oil is transferred from the pump to the point of use. For this purpose a hose extends from the piston and includes adelivery nozzle at its end. Obviously in moving the hose from one point of delivery to another, the hose is apt to become twisted with respect to the pump.

Accordingly, it has been one of the objectives of the present inventor to provide a pump apparatus of the, piston type wherein the hose is free to swivel relative .to the pump despite the fact that it is connected directly to the pump piston. The piston in this instance istubular and may include a handle at its upper end to which the hose is connected.

An additional objective has been that of providing a quickly detachable connection or latch means for securin the handle and the piston relative to the pump container so that the container may be picked up by thehandle and carried from place to place. In other words, when the latch is placed in latching position the piston cannot be drawn upwardly or moved in a pump-' ing stroke but it as well'as the handle, which is fixed to it, are held in position against displacement relative to the container except for the rotative movement which permits the swivelling motion previously discussed.

Thus, the inventor has provided a swivelling connection for the discharge hoserelative to the pump container by attachment to the rotatable piston handle and piston. Furthenhe has provided a quickly operated locking means for securing the piston in lowered position enabling the operator to carry the pump' around through the medium of the handle.

Other objects and certain advantages of the inventor will be more iully. apparent from the following description of the drawings in which: Figure 1 is a vertical sectional viewtaken diametrically of the pump, a portion of the pumpingcylinder being shown externally this View The present pump has j handle.

Cincinnati, Ohio, a corporation 2, 1947, Serial No. 745,387

,5 Claims. (Cl. 222-385) illustrating the arrangement of the part sfin gen .eral.,

, a sectional view taken on line 2- Figure 1, illustrating the locking or latching mechanism for. securing the piston and ,itsQat: 'tached handle in position whereby the pump may be transported by means of its piston operating :Figure 2 is Figure 3 is a fragmentary sectionalview corre-. sponding to theupper portion of Figure 1 but showing the handle and piston moved upwardly in a pumping stroke and the latch ineffectivev for locking the same. i

Figures is .a. fragmentary enlarged sectional view similar tothe lower part of Figure. 1 detail-. ingthe pumping piston at its lower end.

Figure5. is a sectional view taken online 5-5,

F igurei in pecifically to the drawingsg-the pump includes a base indicated at H), a cylindri-v calcontainer or bucket I I, and a top-or cover l2. The; base In hasaraised portion which fits with- -in;the main cylinder H and may be welded or riveted to secureqitv in position therein. I'he raised central. portion of the'bottom is slightly, concave or depressed to provide that-the pump cylinder may extend-beneath the main level ofthe bottom. This permits pumping of oil when the quantity. of oil within the pump is practically exhausted. The base further has a laterally'ex-= tended portion l3 which acts as a platformon which the operator may place his foot to prevent tipping of the pump and to more easily operate thepump;'-* T The cover l2 is removable to permit access'to the contain'en-for replenishing the oil, and to the oil'ejectin'g "means for cleaning and inspection. In order to secure the top in position overthe toppoi tion of the container, it is held in place by thumb'nuts l4 andscrews I5, preferably two or more in number, engaged through theflangef of the "cover andfthe adjacent top margin of the.

container. A hole 15 is provided in the top {2, to

allow theadmissionof airto the container. l

' D epend' from the top I.2 ,centrally thereof is thepump cylinder H. The cylinder has alower end [B ot]decreaseddiameter whichretains a valve ball l9. 'The oil is drawn into the. cylinder beforeejection through the'piston 20. The-valve l9 retains the oil. within the cylinder H. on the downward or v ejecting stroke of the piston 20.

The ball valve |9-is retained in position against movement beyond normal opening movement-on the intake strokeotthe piston by means of'a pin transported by means of the handle when the piston rod is thus latched relative to the container.

2. A pumping apparatus for dispensing oil to a point of use comprising; a container, a pumping cylinder disposed therein, a pumping piston in the cylinder, a piston rod supporting the piston, said cylinder and piston rod supported on the top of the container, the piston rod being rotatable relative to the cylinder, a handle on the upper end of the piston rod and means for latching the pison rod against axial movement when at its lowermost stroke position whereby the pumping apparatus can be transported by means of the handle when the piston rod is locked relative to the container, said latching means consisting of a latch pin mounted in the top of the container for movement tangentially of the piston rod and the piston rod including an annular groove therein engaged by the latch pin when adjacent thereto for holding the piston rod against axial movement.

3. A pump for dispensing oil to a point of use consisting of a container for oil, a pump cylinder depending from the top of said container, a piston rod disposed in said cylinder and including a pumping piston at its lower end, a piston rod guide bushing fixed to the top of the container coaxially of the cylinder and piston rod, the piston rod slidably mounted in said bushing, a handle on the top of said piston rod, said piston rod being rotatable in said bushing, and a latch mechanism in said bushing for locking the piston rod against axial movement in the lowermost position but permitting rotational movement thereof through 360 degrees.

4. A device for dispensing oil under pressure to a dispensing hose, comprising; a container constituting an oil reservoir, a guide bushing mounted upon the container and having an axial bore, a pump unit mounted upon the said guide bushing and extending within the said container, the said pump unit including a piston rod freely movable rotatably and axially in said guide bushing,

said piston rod having a circumferential groove in i its external periphery and having a pump handle mounted externally of said container, said piston rod being constructed for delivery of pump to fluid through said handle, and said handle having means associated therewith for receiving a dispensing hose, the said guide bushing having a bore therein chordally communicating with its axial bore, and a latch pin movably mounted in the chordal bore and adapted to engage the circumferential groove of the piston rod and thereby lock the piston rod against axial movement While allowing it to rotate.

5. A device for dispensing oil under pressure to a dispensing hose, comprising; a container constituting an oil reservoir, a guide bushing mounted upon the container and having an axial bore, a pump unit mounted upon the said guide bushing and extending Within the said container, the said pump unit including a piston rod freely movable rotatably and axially in said guide bushing, said piston rod having a circumferential groove in its external periphery and having a pump handle mounted externally of said container, said piston rod being constructed for delivery of pump to fluid through said handle, and said handle having means associated therewith for receiving a dispensing hose, the said guide bushing having a bore therein chordally communicating with its axial bore, and a latch pin having a leg adapted for sliding movement in the chordal bore and adapted to engage the circumferential groove of the piston rod, said pin having a second leg residing externally of said bushing and configurated to contact the bushing to prevent complete withdrawal of the first leg from the chordal bore.

FRANK C. WOELFER.

REFERENCES CITED The following references are of record in the 

